import Vue from 'vue'
import VueRouter from 'vue-router'
import Reg from '@/views/Reg/Reg.vue'
import Login from '@/views/Login/Login.vue'
import Main from '@/views/Main/Main.vue'
import store from '@/store'
import Home from '@/views/Menus/Home/Home.vue'
import UserInfo from '@/views/Menus/User/UserInfo.vue'
import UserAvatar from '@/views/Menus/User/UserAvatar.vue'
import UserPwd from '@/views/Menus/User/UserPwd.vue'
import ArtCate from '@/views/Menus/Article/ArtCate.vue'
import ArtList from '@/views/Menus/Article/ArtList.vue'

Vue.use(VueRouter)

// 把下面的代码粘贴到路由模块中对应的位置，即可防止路由报错的问题
const originalPush = VueRouter.prototype.push
VueRouter.prototype.push = function push(location) {
  return originalPush.call(this, location).catch((err) => err)
}

// 路由规则数组
const routes = [
  {
    path: '/reg',
    component: Reg
  },
  {
    path: '/login',
    component: Login
  },
  {
    path: '/',
    component: Main,
    // 路由重定向, 写完整路径
    redirect: '/home',
    children: [
      {
        path: 'home',
        component: Home
      },
      {
        path: 'user-info',
        component: UserInfo
      },
      {
        path: 'user-avatar',
        component: UserAvatar
      },
      {
        path: 'user-pwd',
        component: UserPwd
      },
      {
        path: 'art-cate',
        component: ArtCate
      },
      {
        path: 'art-list',
        component: ArtList
      }
    ]
  }
]

const router = new VueRouter({
  routes
})

// 注册全局前置守卫: 每次路由跳转前拦截决定是否放行, 一旦注册必须要调用 next()
// 传入一个回调函数
// 回调函数有 3 个参数
// 参数1: to 到哪里去
// 参数2: from 从哪里来
// 参数3: next 是否放行
router.beforeEach((to, from, next) => {
  // 需求: 如果没有 token 不允许进入除了登录注册以外的所有页面
  // 1. 没有 token
  // 2. 进入的页面不是登录与注册
  if (!store.state.user.token && to.path !== '/login' && to.path !== '/reg') {
    // 提醒用户
    Vue.prototype.$message.error('您没登录哦!')
    // 强行跳转到登录页
    return next('/login')
  }
  next()
})

export default router
